X-ray absorption study of the ferromagnetic Cu moment at the ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}/{\mathrm{La}}_{2/3}{\mathrm{Ca}}_{1/3}{\mathrm{MnO}}_{3}$ interface and variation of its exchange interaction with the Mn moment

Sen, Kaushik; Perret, Edith; Alberca, Aurora; Uribe-Laverde, Miguel Angel; Marozau, Ivan; Yazdi-Rizi, M.; Mallett, Benjamin P. P.; Marsik, Premysl; Piamonteze, C.; Khaydukov, Yu N.; Döbeli, Max; Keller, T.; Biškup, N.; Varela, M.; Vašátko, J.; Munzar, Dominik; Bernhard, Christian

doi:10.1103/PhysRevB.93.205131

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X-ray absorption study of the ferromagnetic Cu moment at the ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}/{\mathrm{La}}_{2/3}{\mathrm{Ca}}_{1/3}{\mathrm{MnO}}_{3}$ interface and variation of its exchange interaction with the Mn moment

Sen, Kaushik University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
Perret, Edith University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
Alberca, Aurora University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland - Swiss Light Source, Paul Scherrer Institut, Villigen PSI, Switzerland
Uribe-Laverde, Miguel Angel University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
Marozau, Ivan University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
Yazdi-Rizi, M. University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
Mallett, Benjamin P. P. University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
Marsik, Premysl University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
Piamonteze, C. Swiss Light Source, Paul Scherrer Institut, Villigen PSI, Switzerland
Khaydukov, Yu N. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany - Max Planck Society Outstation at the Forschungsneutronequelle Heinz Maier-Leibnitz (FRM-II), Garching, Germany
Döbeli, Max Ion Beam Physics, ETH Zurich, Switzerland
Keller, T. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany - Max Planck Society Outstation at the Forschungsneutronequelle Heinz Maier-Leibnitz (FRM-II), Garching, Germany
Biškup, N. Departamento de Física Aplicada III, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Spain - Centro Nacional de Microscopía Electrónica, Universidad Complutense de Madrid, Spain
Varela, M. Departamento de Física Aplicada III, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Spain
Vašátko, J. Department of Condensed Matter Physics, Faculty of Science, and Central European Institute of Technology, Masaryk University, Brno, Czech Republic
Munzar, Dominik Department of Condensed Matter Physics, Faculty of Science, and Central European Institute of Technology, Masaryk University, Brno, Czech Republic
Bernhard, Christian University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland

17.05.2016

Published in:

Physical Review B. - 2016, vol. 93, no. 20, p. 205131

English With x-ray absorption spectroscopy and polarized neutron reflectometry we studied how the magnetic proximity effect at the interface between the cuprate high-TC superconductor YBa2Cu3O7 (YBCO) and the ferromagnet La2/3Ca1/3MnO3 (LCMO) is related to the electronic and magnetic properties of the LCMO layers. In particular, we explored how the magnitude of the ferromagnetic Cu moment on the YBCO side depends on the strength of the antiferromagnetic (AF) exchange coupling with the Mn moment on the LCMO side. We found that the Cu moment remains sizable if the AF coupling with the Mn moments is strongly reduced or even entirely suppressed. The ferromagnetic order of the Cu moments thus seems to be intrinsic to the interfacial CuO2 planes and related to a weakly ferromagnetic intraplanar exchange interaction. The latter is discussed in terms of the partial occupation of the Cu 3d3z2−r2 orbitals, which occurs in the context of the so-called orbital reconstruction of the interfacial Cu ions.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language